Stop mechanism.



W. H. SOHOONMAKER.

STOP MECHANISM.

APPLICATION FILED SEPT. 15. 1910 r 1 1 1 1 Patented Dec 15,1914.

2 SHEETS-SHEET 1.

W, H. SGHUONMAKER.

STOP MECHANISM.

APPLICATION FILED SBPT.15,1910.

Patented Dec. 15, 1914.

2 SHEETS-SHEET 2.

WILLIAM H. SCHOONMAKER, OF llIONTCLAIE,

MIL 23 NEW JERSEY? saoi? MECHANISM.

Application filed September 15, 1910. Serial 370.

useful Improvements in Stop lilechamsms.

of which the following is a full. clear. and

exact specification. such as will enable others skilled in the art towhich it appertains to make and use the same.

a automatic stop device particularly applicable to sound reproducing"machines, by which the motion of the record and other parts of themachine is arrested at the end of the reproduction of the thing that isrecorded.

The invention is intended particularly for use with those machinesemploying a flat disk record. but it is applicable to other machines asWill fully appear hereinafter.

Devices with the same object have to my knowledge been patented previousto my invention. but they have involved contacts on the record andreproducer and these are obj eitionable in that they ii ericre with theprocess of manufacture of the records and further in that they areunsieht y and cumbersome. My. invention seeks to accom- Ilish the end inview without this disadvantage.

To this end the invention consists in ce'rtain novel features ofconstruction and con bination of parts which will be fully set forthhereinafter and particularly pointed out in the claims.

Reference is now had to the accompanying drawings which illustrate as anexample the preferred embodiments of my in vention.

In these drawings Figure l is a perspective view of a disktype soundreproducing machine showing parts broken away to expose parts of myimproved stop motion mechanism. Fig. 2 is a side elevation of thecontact arm and its adjusting; devices. showing the souiul'carrying armof the machine: Fig. is a detail section showiu; the manner of mountingthe contact mm: Fig. 1 is a side elevation of the stop actuating;devices; Figs. 5 and 6 are detail vievvs of the circuit breaker and stopapplier: Fig. 7 is a diagram of the circuit; and Fig. 8 is a plan viewof a disk type machine fitted with a modified form of 55 the stopmechanism.

The type of the machine in Fig. 1 is that Specification of LettersPatent.

T he objectof my invention is to provide of a disk record, and in saidview it cates the box containing the motor arm supp orting the soundtube 12. reproducer, and 17 the disk. which broken away to disclosecertain parts of my invention.

The sound tube 12 is mounted in an up bearing 16 on the arm 11 andcoinciiiicn' with the axis of said bearing the tube pro vided With adownwardly projected stud ii. which bears on the pin '18 carried by thearm 11. and serving as a "top li(;Ui" j the arm allowing" it to curl ofthe record disk as is us 1. chines. To this stud 17 a disl fastened andthe disk carri s on i i annulus 90 which is free to rotate arou: thedisk, said annulus ng; curved i teriorly to receive th slunvn in Fig. 3.Projecting i 20 is an arm 21 wit articulated and this to a suitable adas a linger lev; rant Tl, tact. arm i. projects fro disk, lying-I hetvvthe box 10. are held c of the devices arm 27) follows the (notion Saidarm. however. may he an tively to the tube by the lever connection.

26 indicates a contact mounted suitahl. insulated on the top 05 the box10. and the path of the arm and adapted engaged thereby when the.reproduccr has reached the end of the record. r purpose the. arm 25 hasa contact upon the engagement of the parts :26 ans; the electricalcircuit forming; part of my invention will be closed. Preferably thecontact 26 is in the form of a permanent ma net and the contact 2? isof: magnetic metal so that the instant contact is made the parts areattracted to each other and held eniia l thus preventing vibration oithe lL\: and a consequent uncertainty oi ope itiou. The contact 26 isconnected by a. vrire 23 to the circuit breaking de ice shown in Ch"tail in Figs. 5 and 6. This consists of two metal fingers 99 andBOarranged within the box 10 and insulated from each other by aninsulationbracket 31. The finger 30 is resilient and tends to spring away from thef nger 29 as shown in Fig. 5. Sai'd fingers are provided with contactswhich when engaged close the circuit but which break the circuit whenseparated as in Fig. Mounted vertically in the box is a rock shaft 33,the upper end of which projects above the box and is provided with aneccentric brake 3e adapted to engage the periphery of the table on whichthe record is mounted. The motion of this brake into active position iscontrolled by a stop screw carried in a stud 36 on top of the box. Byadjusting this screw the extent to which the brake engages the table maybe regulated. A. torsional spring37 is coiled around the shaft 33 andserves to throw the brake into operation. The shaft 33 carries at itslower end an arm 38 which, when the brake is not active, is engaged withan insulation extension 39 on the finger 30 and holds said finger in theposition shown in Fig. 6 in which the circuit is closed. The parts are Iretained as in Fig. 6 by a detent e'O on the armature ll on anelectromagnet 42. The armature e'l is held raised by a spring l3 andwhen the armature is attracted the detent 40 moves down with thearmature ll disengaging the detent 40 from the projection l4.- on thearm 38. This allows the spring 37 to assert itself and'relieves thespring arm 30 breaking the circuit as well as throwing the brake 34':into engagement with the table 'of the machine stopping the same withthat degree of promptness which is permitted by the adjustment of thestop 35.

To relieve the brake it is only necessary to throw it away from thetable by manual operation which returns the arm 38. reengaging it withthe projection 39 and closing the circuit. Thereupon. the parts are heldin this set adjustment by reengagement of the elements l0 and ll. Themachine is provided with means for manually applythe brake at any time,consisting simply of a push nin l5, which is vertically movablein abearing 46 in the top of the box .10 and adapted to engage the armature41. A spring 47 may be provided to hold the push pin raised. Bydepressing the pin the armature i-l may be moved down releasing the arm39 the some as though the armature had been attracted by the magnet. Thearm 30-is connected by a wire-l8 to the electro-magnct and this isjoined by a wire 49 to a battery 50. which in turn is grounded on thearm 11.

The operation of the apparatus maybe traced as follows: The circuit isnormally various records.

the end of the record is reached the contact 27 will engage the contact26 and be held engaged therewith by the magnetic character of thelatter. This closes the circuit. Instantly the armature 41 is attractedthe arm 38 is released. .Two things then happen, namely, the circuit isbroken at the arms 29 and 30 and the spring 37 throws the brake 34 intoengagement with the table of the machine stopping the motion thereof.The parts are restored to operative position by manually releasing thebrake as explained.

In sound reproducing apparatus of the class in question the records areof varying lengths and therefore it is impracticable to make a permanentadjustment which will stop the-machine at proper intervals for the It istherefore necessary to adjust the arm 25 to suit the particular rec- 0rdbeing produced. In the practical ap plication of my invention thereforeit is only necessary to provide a scale on the quadrant 24; or other-adjusting device and to mark uponeach record a numeral or char actercorresponding to those on the quadrant. The operator then upon startingthe machine need only adjust-the lever 23 to the character marked on therecord which he 15 about to use. For example, if a record of a givenlength is marked with the numeral 3 then the operator turns the lever23- to the point marked 3 on the quadrant. in other respects the actionis wholly automatic.

It should be obvious that by a mere reversal of organization theadjustment referredto may be effected by movement of the contact on thebox 10, as distinguished from the movement of the contact which swingswith the sound tube. An example of such an arrangement'is shown in Fig.3. where the arm 25 instead of being adjustably mounted on the soundtube 12 is fastened securely thereto and moves with it as a unit. Thecontact 26 is adjustable toward and from the contact 27 by mounting iton an arm 52 inturn carried by a vertical rock shaft 53 suitable mountedin the box 10 and extending into the same. The contact 23 thereforeswings in an etc to ward and from the contact 27 and to insureengagement at all times the former contact is arc-shaped as shown.

To the rock shaft 53 a link 54 is joined through an arm 55 on the shaft.This link is pivoted to one arm of an elbow lever 56 fulcrumed in thebox 10 and having its other arm projected out of the box alongside ofaquadrant 57. On this quadrant is a scale-of the same character and forthe same purpose as the quadrant 24;. By adjusting the lever 56 theadjustment of the contact 26 will follow.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States is:

1. The combination with a rotatable memher, and a swinging memberarranged to travel across said rotatable member during the rotationthereof, of motion-arresting means for said rotatable member, comprisingan arm pivotally-connected to said swinging member 'to move with respectthereto for purpose of adjustment, a notched sector secured to saidswinging member, a swinging lever arranged to move with respect to saidsector and provided with means adapted to engage the notches of saidsector to secure the lever in different positions with respect to saidsector, means connecting said lever to said arm, whereby motion of saidlever with respect to said sector effects change of position of said armwith respect to said swinging member, and means arranged to be engagedby said arm at a predetermined point in the movement of said swingingmember and by reason of such engagement to effect tatable member.

2. The combination with a rotatable memher, and a swinging memberarranged to travel across said rotatable member during the rotationthereof, said swinging member provided with an annulus embracing saiddisk and supported thereby but movable rotatively with respect thereto,said annulus provided with a projection, adjusting means movably mountedupon said swinging member and connected to said projection, whereby saidarm may be moved with respect to said swinging member, said adjustingmeans comprising means for securing the said arm,- with respect to theswinging member, in

various adjusted positions, whereby said arm when so secured will movewith said swinging member, and means arranged to be engaged by said armat a predetermined point in the movement of said swinging member and byto effect arrest of said rotatable member.

arrest of said ro-.

a disk, an arm provided with reason of such engagement 3. Thecombination with a rotatable member, and a member arranged to travelacross said rotatable member during the rotation thereof, of two contactpieces, one movable with said traveling member and arranged to contactwith the other of said contact pieces, at a predetermined point in themovement of said traveling member, one of said contact pieces beingmagnetized and the other being of magnetic material, where' by a firmcontact between said contact members is assured, and a circuitcontrolled by said contact members and including means arranged, whenoperated by said circuit, to effect arrest of said rotatable member.

4. The combination with a rotatable member, a motor for rotating saidmember, a-

- case inclosing such motor, the said rotatable member being exterior tothe case, and a member arranged to travel'across said rotatable memberduring the rotation thereof, of motion arresting means for saidrotatable member comprising a brake adapted to engage said rotatablemember, means tending to move said brake into engagement with saidrotatable member, a detent normally preventing such movement of suchbrake, an

.electro-magnet adapted when energized to operate said detent to releasesaid brake, a circuit including said magnet, contact means operated bysaid traveling member arranged to close said circuit at a predeternnnedpoint in the operation of said traveling member, and spring contactmeans included in said circuit and located within said case and heldclosed by said detent when the latter is holding back the brake, saiddetent arranged to release said spring contact means to permit same toopen said circuit when the brake is released.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

lVILLIAM H. SCHOONMAKER.

W'itnesses:

F. C. MARTIN, B. BIGGE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

